Chemistry 030-205-02 October 16, 2008 Problem Set 5 1.Rank the following in order of stability (lowest to highest): ABCD2. The heats of formation (∆Hf) and the heats of hydrogenation (∆Hh) of several isomeric pentenes are given below. By how much (in kcal/mol) is 2-methylbutane more stable than pentane? 3.Which of the following molecules is/are chiral? ClBrBrHHAOHOHBHHOHCOOHOHCOOHC∆Hf(kcal/mol) −5.0 −7.5 −6.5 −9.0 −10.0∆Hh(kcal/mol) −30.0 −27.5 −28.5 −28.0 −27.0

This
preview
has intentionally blurred sections.
Sign up to view the full version.